Yikes - ya just got married AND yer gonna have a little one soon. Talk about a change in lifestyle!

I've got a couple of boys. Wouldn't trade 'em for nuthin. However, they DO require mucho time. You gotta be willing to put your life on hold - for about eighteen years or so.
We snagged a couple of bikes for the boys...one's a KV75 (we painted it Ducati red) which is a great starter bike (auto trans). Next was an XR-80. These were both garage sale specials. Can't afford anything new. Both bring back memories of my childhood. I'm also lucky in that I married a motorcycle chick - she understands the psyche. The no-fun part is the amount of cash-flow needed to keep the bikes running. Funny, I don't remember sprockets, chains, tires costing so much when I was a kid! Then you've got to put up the $$ for helmets, gloves, boots - which they quickly outgrow.
Not trying to bring you down, because like I already said - it's worth it. I wouldn't change a thing (other than maybe winning a Lotto would be sweet).
BTW - the 14 year-old is already buggin me. Hey Dad - can I ride the 80 over to my friends house? Hell no! (although we used to do that all the time when I was growing up - it's a different world now). It may sound cliche, but it is hard to let 'em ride / have fun because you're worried somehow they could hurt themselves. Kids are resilient though. They'll take a beating and come back for more! Just remember your childhood and give 'em a little slack on the leash. They learn in a hurry.
Good luck. Sounds like your heart is in the right place. Just keep thinking those happy thoughts as you're waking up 3-4 times a night with the new addition. It'll pay off big time in the end.
- Jim
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...I don't want a pickle
I just wanna ride my motor - sickle...